martha: what do you think of mitt romney with regard to the debates, how ready do you think he is? >> he raised his game as a debater between 2008 and 2012. he was pretty effective in the debates this year. he kept his cool, his composure, he kept that sort of smile on his face and remained at least visibly unrattled by whatever happened, and when he had to do it and go on the attack he did it and we all remember the debate i guess it was in florida with newt gingrich where he basically took gingrich's pants off on the issue of what was in his investment portfolio and won that state by a big margin. this is obviously tk- different. it's a national audience, not a republican audience, he has to win people over. it's a different kind of challenge over a sitting president who is pretty smooth performer. what john roberts said is right, debates sometimes make a difference but not very often. normally what happened in debates people for you going in are still for you coming out and not a lot of minds get chained. chris christie saying it could change everything, it could happen but not